我用过single.php 对于此代码：

<?php $categories = get_the_category($post->ID);
if ($categories) {
    $category_ids = array();
    foreach($categories as $individual_category) $category_ids[] = $individual_category->term_id;
    $args=array(
        \'category__in\' => $category_ids,
        \'post__not_in\' => array($post->ID),
        \'showposts\'=>6, //Gösterilecek yazı adeti
        \'caller_get_posts\'=>1
    );
    $benzer = new wp_query($args);
    if( $benzer->have_posts() ) {
        while ($benzer->have_posts()) {
            $benzer->the_post();
    ?>
    <div class="urundetaykutu">
        <a href="<?php the_permalink(); ?>" title="<?php the_title(); ?>"><?php the_title(); ?></a>
    </div>  
    <?php } } wp_reset_query(); }?>